.scan-wrapper{
    margin: 100px auto;
    width: 424px;
    text-align: center;
}
.scan-wrapper h1{
    margin-bottom: 30px;
    line-height: 30px;
    font-size: 24px;
    color: rgb(254,254,254);
}
.scan-wrapper .tips{
    cursor: pointer;
    margin-top: 49px;
    padding: 20px 0;
    line-height: 24px;
    font-size: 24px;
    text-align: center;
    width: 422px;
    height: 70px;
    background-color: #313131;
    color: rgb(254,254,254);
    -webkit-border-radius:8px;
    -moz-border-radius:8px;
    border-radius: 8px;
}